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Wild Tropical Blueberries Extremely High In Antioxidants


The first analysis of the healthful antioxidant content of blueberries that grow wild in Mexico, Central and South America concludes that some of these fruits have even more healthful antioxidants than the blueberries -- already renowned as "super fruits" -- sold throughout the United States. These extreme super fruits could provide even more protection against heart disease, cancer and other conditions, the report suggests.

Blueberry consumption has previously been linked to reduced risk of Alzheimer’s, and the beneficial effects of the blueberries are thought to be linked to their flavonoid content - in particular anthocyanins and flavanols. The exact way in which flavonoids affect the brain are unknown, but they have previously been shown to cross the blood brain barrier after dietary intake.

It is believed that they may exert their effects on learning and memory by enhancing existing neuronal connections, improving cellular communications and stimulating neuronal regeneration.

The most recent study appear in ACS' Journal of Agricultural and Food Chemistry.

Edward Kennelly and colleagues note that although there are over 600 species of blueberries and blueberry-like fruits growing in Mexico, Central and South America (the so-called "neotropics"), very little research has been done on them. U.S.-grown blueberries are already famous for their antioxidants, which help the body get rid of harmful free radicals. So, the researchers decided to find out how neotropical blueberries stacked up against a grocery-store variety.

They found that two types of neotropical blueberries were extreme super fruits -- they had significantly more antioxidants than a type of blueberry commonly sold in U.S. supermarkets stores. The researchers say that these neotropical blueberries "have the potential to be even more highly promising edible fruits."

The authors acknowledge funding from the U.S. National Institutes of Health.


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